obama immediately faced questions on how the petraeus scandal affected his white house. >> i have no evidence at this point from what i've seen that classified information was disclosed that in any way would have had a negative impact on our national security. >> reporter: and the president refused to pass judgment on the investigation. >> i am withholding judgment on how the entire process surrounding general petraeus came up. >> reporter: the real fireworks came when the president was asked about negative comments from republican senators on the possibility that u.n. ambassador susan rice could become secretary of state. >> we'll do everything to block the nomination within our power as far as susan rice is concerned. >> i don't trust her -- and the reason i don't trust her is because i think she knew better, and if she didn't know better she shouldn't be the voice of america >> reporter: he referred to rice's appearance on "meet the press" days after the benghazi attack. >> but this is a spontaneous reaction to a video. >> reporter: today, the president was visibly angry. >> if se